Science: Closing the Blue Book

With almost as much attentiveness as it gives to the comings and goings
of its own planes, the U.S. Air Force has carefully logged every
unidentified flying object that has been reported in the American skies
during the past 22 years. During that time, Project Blue Book, as the
operation was called, looked into a total of 12,618 UFO sightings. Yet
lately, the flying-saucer business has fallen on hard times. Only 146
UFO sightings have been reported to the Air Force so far this year v. a
peak of 1,501 in 1952. The decline is due partly to the Condon...